M.C.202,
The best place to get the stall speeds is from the pilots manuals. I have the F4U manual which list the range of stall speeds from 10,000lbs to 15,000lbs as well as climb in those weighted conditions. I also have the P-38 manual that list the same although not quite as detailed unfortunately. As you calculate the max Cl at different weights it will vary slightly but you will get the idea within a couple of tenths.
Here is another fun calc.
For instance if you know that the F4U stalls at 96mph at 11,300lbs the you can find out the 3G stall speed very quickly also. Just take the square of the of the G factor(3) which is 1.732 and multiply it with the stall speed of 96mph.
3G stall =166.27MPH
How do you know it's right? Compare it to the flight test data and it is so close it's scary. This number obviously changes with weight but the max Cl will stay the same unless flaps are deployed then the Cl goes up and stall speed goes down.
Also try Zigrats spreadsheet
http://www.iit.edu/~buonmic/aircraft-test.xls It is very close and easy to read. But again you need to know the 1G stall at what weight. Very important that the stall is at the correct weight or else it porks everything.
BTW, Those calcs I listed came from Wells. So if I'm wrong blame him, just kidding.
Niklas also knows this stuff but he likes to use max Cl numbers from just the wing with no prop or prop wash so they always come out to low. But he is a Luftwabble so he might have some stuff on the C200, C202 and C205.
Later
F4UDOA